A simple random sample of size n = 12 is drawn from a population that is normally distributed. The sample mean is found to be x? = 68 and the sample standard deviation is found to be s = 14. Construct a 90% confidence interval about the population mean. The lower bound is . The upper bound is . (Round to two decimal places as needed.)
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We are given the sample mean (x̄) = 688, sample standard deviation (s) = 14, and sample size (n) = 12. Show more…
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